1
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Khan S, Chatterjee A, Nair AM, Volla CMR. A highly diastereoselective one-pot Ugi/radical spirocyclization/aza-Michael addition sequence. Org Biomol Chem 2024; 22:3887-3892. [PMID: 38683654 DOI: 10.1039/d4ob00610k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
We hereby report a highly diastereoselective synthesis of chalcogenated azaspirotricycles via a one-pot Ugi/spirocyclization/aza-Michael addition sequence. The reaction proceeds via a key visible light mediated spirocyclization step under mild, metal-free and energy efficient conditions. A variety of complex sulfenylated and selenylated azaspirotricycles were obtained in good yields. The reaction was found to be scalable and preliminary mechanistic studies indicated that the spirocyclization step proceeds via radical intermediates.
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Affiliation(s)
- Salman Khan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Abhradeep Chatterjee
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Akshay M Nair
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Chandra M R Volla
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
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2
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Liu C, Voskressensky LG, Van der Eycken EV. Recent Advances in the Synthesis of Peptidomimetics via Ugi Reactions. Chemistry 2024; 30:e202303597. [PMID: 38123521 DOI: 10.1002/chem.202303597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/19/2023] [Accepted: 12/20/2023] [Indexed: 12/23/2023]
Abstract
Peptidomimetics have been extensively explored in many area due to their ability to improve pharmacological qualities and interesting biological activities. Cycles could be incorporated in peptides to reduce their flexibility, often enhancing the affinity for a certain receptor. Many efforts have been made to synthesize various peptidomimetics. Among them, the Ugi reaction is a popular way for the synthesis of peptidomimetics because it provides peptide-like products. The Ugi reaction consists of the condensation of an aldehyde or ketone, a carboxylic acid, an amine, and an isocyanide usually giving a linear peptidomimetic. In order to obtain other linear, cyclic or polycyclic peptidomimetics, the acyclic products have to undergo additional transformations or cyclizations. This review covers the years from 2018-2023, regarding the synthesis of linear, cyclic and polycyclic peptidomimetics, employing Ugi reactions eventually followed by post-Ugi transformations. Organo-catalyzed reactions, base-promoted reactions, and metal-free reactions toward peptidomimetics are highlighted.
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Affiliation(s)
- Chao Liu
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Leonid G Voskressensky
- Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya st. 6, Moscow, 117198, Russian Federation
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium
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3
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Ge JC, Wang Y, Guo FW, Kong X, Hu F, Li SS. Dearomatization of 3-Aminophenols for Synthesis of Spiro[chromane-3,1'-cyclohexane]-2',4'-dien-6'-ones via Hydride Transfer Strategy-Enabled [5+1] Annulations. Molecules 2024; 29:1012. [PMID: 38474524 DOI: 10.3390/molecules29051012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 02/16/2024] [Accepted: 02/21/2024] [Indexed: 03/14/2024] Open
Abstract
The Sc(OTf)3-catalyzed dearomative [5+1] annulations between readily available 3-aminophenols and O-alkyl ortho-oxybenzaldehydes were developed for synthesis of spiro[chromane-3,1'-cyclohexane]-2',4'-dien-6'-ones. The "two-birds-with-one-stone" strategy was disclosed by the dearomatization of phenols and direct α-C(sp3)-H bond functionalization of oxygen through cascade condensation/[1,5]-hydride transfer/dearomative-cyclization process. In addition, the antifungal activity assay and derivatizations of products were conducted to further enrich the utility of the structure.
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Affiliation(s)
- Jia-Cheng Ge
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
- Hailir Pesticides and Chemicals Group Co., Ltd., Qingdao 266109, China
| | - Yufeng Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Feng-Wei Guo
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Xiangyun Kong
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Fangzhi Hu
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Shuai-Shuai Li
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
- Hailir Pesticides and Chemicals Group Co., Ltd., Qingdao 266109, China
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4
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Feng GC, Li JC, Huang X, Liu JK, Wu B, Yang JM. Cascade hydroarylation/Diels-Alder cycloaddition of alkynylindoles with electron-deficient alkynes and alkenes. Chem Commun (Camb) 2024; 60:328-331. [PMID: 38063477 DOI: 10.1039/d3cc05210a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
Herein, a novel cascade gold(I)-catalyzed hydroarylation of alkynylindoles and subsequent Diels-Alder cycloaddition with electron-deficient alkynes and alkenes is described. A variety of azepino-fused hydrocarbazoles and carbazoles were obtained in moderate to excellent yields. Key features of this methodology are low catalyst loadings, high regioselectivity, broad functional group tolerances, access to important heterocycles, and 100% atom economy.
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Affiliation(s)
- Guang-Chao Feng
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, People's Republic of China.
| | - Jun-Chi Li
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, People's Republic of China.
| | - Xiang Huang
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, People's Republic of China.
| | - Ji-Kai Liu
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, People's Republic of China.
| | - Bin Wu
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, People's Republic of China.
| | - Jin-Ming Yang
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, People's Republic of China.
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5
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Nelli MR, Cantrell RL, Looper RE. Gold Catalyzed 7- endo-dig Hydroaminations Yielding 1,4-Diazepineones. J Org Chem 2023; 88:15975-15982. [PMID: 37890169 DOI: 10.1021/acs.joc.3c01215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/29/2023]
Abstract
Strategies to access the 1,4-diazepindiones heterocyclic core of the TAN-1057 family of natural products revealed a successful gold-catalyzed hydroamination of yneamide tethered amines. The precursor amino-yneamides are derived from easily accessible 1,2-diamines and alkynoic acids and are efficiently cyclized to the corresponding diazepineones.
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Affiliation(s)
- Matthew R Nelli
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Rachel L Cantrell
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Ryan E Looper
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
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6
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Tang X, Song L, Van der Eycken EV. Post-Ugi Cyclizations Towards Polycyclic N-Heterocycles. CHEM REC 2023; 23:e202300095. [PMID: 37218998 DOI: 10.1002/tcr.202300095] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 05/08/2023] [Indexed: 05/24/2023]
Abstract
The Ugi reaction has become one of the highly explored reactions for the formation of multifunctional adducts, due to the mild reaction conditions, wide scope and high variability. By carefully selecting the starting four components, Ugi-adducts could undergo different kinds of post-transformations for the synthesis of bioactive heterocycles, natural products and macrocycles. Considering the significance of polycycles, diverse post-Ugi transformations have been developed over the years for constructing structurally novel polycycles. In this account, we summarize important efforts for the synthesis of polycyclic N-heterocycles via post-Ugi cyclizations from the Van der Eycken laboratory onwards 2016. With the aid of transition metal catalysis from gold, rhodium, silver and palladium, as well as metal-free strategies, versatile polyheterocycles are prepared with high efficiency and step-economy.
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Affiliation(s)
- Xiao Tang
- College of Science, Nanjing Forestry University, 210037, Nanjing, China
| | - Liangliang Song
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, 210037, Nanjing, Jiangsu, China
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium
- Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, 117198, Moscow, Russia
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7
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Liu C, Van der Eycken J, Van der Eycken EV. Transition Metal-Free N-S Bond Cleavage and C-N Bond Activation of Ugi-Adducts for Rapid Preparation of Primary Amides and α-Ketoamides. Chemistry 2023; 29:e202301541. [PMID: 37410246 DOI: 10.1002/chem.202301541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/05/2023] [Accepted: 07/06/2023] [Indexed: 07/07/2023]
Abstract
A novel method of transition metal-free N-S bond cleavage and subsequent C-N bond activation of Ugi-adducts was developed. Diverse primary amides and α-ketoamides were prepared in a rapid, step-economical and highly efficient manner in two steps. This strategy features excellent chemoselectivity, high yield and functional-group tolerance. Primary amides derived from the pharmaceuticals probenecid and febuxostat were prepared. This method opens a new pathway for the simultaneous synthesis of primary amides and α-ketoamides in an environmentally friendly manner.
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Affiliation(s)
- Chao Liu
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 (S.4), Ghent, 9000, Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, 3001, Leuven, Belgium
- Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya street 6, Moskva, RU-117198, Moscow, Russia
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8
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Mahecha-Mahecha C, Borrego-Muñoz P, Pombo LM, Gamba-Sánchez D. On the way to potential antifungal compounds: synthesis and in vitro activity of 2-benzofuranylacetic acid amides. RSC Adv 2023; 13:25296-25304. [PMID: 37622023 PMCID: PMC10445276 DOI: 10.1039/d3ra04737g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 08/17/2023] [Indexed: 08/26/2023] Open
Abstract
Crop losses caused by microbial infections are a significant global issue, especially in tropical regions. The development of novel antimicrobial agents, particularly antifungal agents, has been explored from various perspectives, including chemical synthesis. However, conventional approaches typically involve synthesizing new and potent compounds on a small scale (a few milligrams), making the scale-up of the reaction a major challenge. In this manuscript, we present a method for the synthesis of new and active (against Fusarium oxysporum) benzofuranyl acetic acid amides. Our strategy allows us to synthesize the key precursor on the gram scale, enabling the production of sufficient quantities of other active compounds within short timeframes for conducting biological studies. All the reactions used in this manuscript are recognized by their industrial application.
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Affiliation(s)
- Camilo Mahecha-Mahecha
- Laboratory of Organic Synthesis, Bio and Organocatalysis, Chemistry Department, Universidad de Los Andes Cra 1 No. 18A-12 Q:305 Bogotá 111711 Colombia
| | - Paola Borrego-Muñoz
- Escuela de Medicina, Fundación Universitaria Juan N. Corpas Bogotá 110311 Colombia
| | - Luis M Pombo
- Escuela de Medicina, Fundación Universitaria Juan N. Corpas Bogotá 110311 Colombia
| | - Diego Gamba-Sánchez
- Laboratory of Organic Synthesis, Bio and Organocatalysis, Chemistry Department, Universidad de Los Andes Cra 1 No. 18A-12 Q:305 Bogotá 111711 Colombia
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9
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Mendogralo EY, Uchuskin MG. Synthesis of tetrahydrofuro[3,2- c]pyridines via Pictet-Spengler reaction. Beilstein J Org Chem 2023; 19:991-997. [PMID: 37404803 PMCID: PMC10315887 DOI: 10.3762/bjoc.19.74] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 06/20/2023] [Indexed: 07/06/2023] Open
Abstract
A semi-one-pot method for the synthesis of 4-substituted tetrahydrofuro[3,2-c]pyridines by the Pictet-Spengler reaction was developed. The method is based on the condensation of easily accessibly 2-(5-methylfuran-2-yl)ethanamine with commercially available aromatic aldehydes followed by acid-catalyzed Pictet-Spengler cyclization. Using this approach, we synthesized a range of 4-substituted tetrahydrofuro[3,2-c]pyridines in reasonable yields. The reactivity of some of the products was investigated and selected synthetic transformations of the obtained tetrahydrofuro[3,2-c]pyridines were shown.
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Affiliation(s)
- Elena Y Mendogralo
- Perm State University, Bukireva st. 15, Perm, 614990, Russian Federation
| | - Maxim G Uchuskin
- Perm State University, Bukireva st. 15, Perm, 614990, Russian Federation
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10
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He J, Zhang J, Li Y, Han YB, Li M, Zhao X. Insights into Synergistic Effects of Counterion and Ligand on Diastereoselectivity Switch in Gold-Catalyzed Post-Ugi Ipso-Cyclization. ACS OMEGA 2023; 8:22637-22645. [PMID: 37396265 PMCID: PMC10308395 DOI: 10.1021/acsomega.3c01279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Accepted: 05/24/2023] [Indexed: 07/04/2023]
Abstract
The concept of diastereoselectivity switch in gold catalysis is investigated, which primarily depends on the effects of ligand and counterion. The origins of gold-catalyzed post-Ugi ipso-cyclization for the diastereoselective synthesis of spirocyclic pyrrol-2-one-dienone have been explored with density functional theory calculations. The reported mechanism emphasized the importance of the cooperation of ligand and counterion in diastereoselectivity switch, leading to the stereocontrolling transition states. Furthermore, the nonbonding interactions primarily between the catalyst and the substrate play a significant role in the cooperation of ligand and counterion. This work would be useful to further understand the reaction mechanism of gold-catalyzed cyclization and the effects of ligand and counterion.
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Affiliation(s)
- Jun He
- Institute
of Molecular Science and Applied Chemistry, School of Chemistry, State
Key Laboratory of Electrical Insulation and Power Equipment &
MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of
Condensed Matter, Xi’an Jiaotong
University, Xi’an 710049, China
| | - Jie Zhang
- Institute
of Molecular Science and Applied Chemistry, School of Chemistry, State
Key Laboratory of Electrical Insulation and Power Equipment &
MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of
Condensed Matter, Xi’an Jiaotong
University, Xi’an 710049, China
| | - Yunhe Li
- School
of Materials Science and Engineering, Lanzhou
Jiaotong University, Lanzhou 730070, China
| | - Yan-bo Han
- Institute
of Molecular Science and Applied Chemistry, School of Chemistry, State
Key Laboratory of Electrical Insulation and Power Equipment &
MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of
Condensed Matter, Xi’an Jiaotong
University, Xi’an 710049, China
| | - Mengyang Li
- School
of Physics, Xidian University, Xi’an 710071, China
| | - Xiang Zhao
- Institute
of Molecular Science and Applied Chemistry, School of Chemistry, State
Key Laboratory of Electrical Insulation and Power Equipment &
MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of
Condensed Matter, Xi’an Jiaotong
University, Xi’an 710049, China
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11
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Gao J, Luo K, Wei X, Wang H, Liu H, Zhou Y. Rh(III)-Catalyzed Successive C-H Activations of 2-Phenyl-3 H-indoles and Cyclization Cascades to Construct Highly Fused Indole Heteropolycycles. Org Lett 2023; 25:3341-3346. [PMID: 37144839 DOI: 10.1021/acs.orglett.3c00445] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Rh(III)-catalyzed successive C-H activations of 2-phenyl-3H-indoles and cyclization cascades with diazo compounds were developed to construct highly fused indole heteropolycycles with a broad range of substrates and good yields. In particular, this transformation included two successive C-H activations and unusual [3+3] and [4+2] sequential cyclization cascades, in which the diazo compound played a different role in the two cyclization processes, while simultaneously forming a highly fused polycyclic indole scaffold with a new quaternary carbon center.
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Affiliation(s)
- Ju Gao
- College of Pharmacy, Weifang Medical College, Weifang 261053, China
- Drug Discovery & Development Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Keyu Luo
- Drug Discovery & Development Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaohui Wei
- Drug Discovery & Development Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Hao Wang
- Drug Discovery & Development Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Hong Liu
- College of Pharmacy, Weifang Medical College, Weifang 261053, China
- Drug Discovery & Development Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yu Zhou
- Drug Discovery & Development Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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12
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Kumar S, Kajol K, Nayak P, Kumar A, Ramesh C. Synthesis of tetracyclic 4H-benzo[5,6]chromeno[3,4-d]oxazoles via palladium-catalyzed intramolecular direct heteroarylation. Chem Asian J 2023; 18:e202201151. [PMID: 36519340 DOI: 10.1002/asia.202201151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/12/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
We report a palladium-catalyzed intramolecular direct heteroarylation of oxazole tethered β-naphthols to access corresponding tetracyclic 4H-benzo[5,6]chromeno[3,4-d]oxazoles. Various functional groups are well tolerated and furnished the desired products in good to excellent yields under the present reaction conditions. The scale-up reaction and synthetic utility of the resulting molecules have been demonstrated. Moreover, UV/vis absorption and fluorescence emission properties have been evaluated for these polyheterocyclic compounds.
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Affiliation(s)
- Sujeet Kumar
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute BS-10/1, Sector 10 Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India.,Academy of Scientific and Innovative Research, New Delhi, 110001, India
| | - Km Kajol
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute BS-10/1, Sector 10 Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India
| | - Prakash Nayak
- School of Chemical Sciences National Institute of Science Education and Research (NISER), Bhubaneswar, HBNI, Bhubaneswar, 752050, Odisha, India
| | - Amit Kumar
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute BS-10/1, Sector 10 Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India.,Academy of Scientific and Innovative Research, New Delhi, 110001, India
| | - Chintakunta Ramesh
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute BS-10/1, Sector 10 Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India.,Academy of Scientific and Innovative Research, New Delhi, 110001, India
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13
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Singh SP, Kumar A, Kant R, Srivastava AK. Regioselective Synthesis of Functionalized Pyrrolo[1,2- a]pyrazine-3,6(2 H,4 H)-diones via Tandem Post-Ugi Cyclization and Gold(I)-Catalyzed Annulation. J Org Chem 2022; 87:12799-12815. [PMID: 36149815 DOI: 10.1021/acs.joc.2c01404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A convenient synthesis of less explored pyrrolo[1,2-a]pyrazine-3,6(2H,4H)-diones is described in two steps from Ugi adducts. The method involves acid-mediated cyclization of Ugi adducts to form dihydropyrazinones followed by gold(I)-catalyzed regioselective annulation. The generality of the transformation was established by reacting a variety of substituted dihydropyrazinones under the optimized reaction conditions to form densely functionalized pyrrolo[1,2-a]pyrazine-3,6(2H,4H)-diones in good-to-excellent yields. It was also observed some of the acetone-derived Ugi adducts furnish 7-acyl-pyrroloimidazolones as a byproduct during TFA-mediated cyclization via alkyne-carbonyl metathesis and condensation.
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Affiliation(s)
- Sangh Priya Singh
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, UP 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, UP 200201, India
| | - Asheesh Kumar
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, UP 226031, India
| | - Ruchir Kant
- Molecular & Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow, UP 226031, India
| | - Ajay Kumar Srivastava
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, UP 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, UP 200201, India
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14
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Yang JM, Yao ML, Li JC, Liu JK, Wu B. Access to Azepino-Annulated Benzo[ c]carbazoles Enabled by Gold-Catalyzed Hydroarylation of Alkynylindoles and Subsequent Oxidative Cyclization. Org Lett 2022; 24:6505-6509. [PMID: 36047768 DOI: 10.1021/acs.orglett.2c02293] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we report a facile and efficient synthetic method to construct azepino[1,2-a]indoles through a novel gold(I)-catalyzed intramolecular hydroarylation of alkynylindoles. A wide range of functional groups can be well tolerated in this transformation, and the corresponding highly functionalized azepino[1,2-a]indole skeletons were obtained in moderate to excellent yields. Subsequent oxidation of the products gave the interesting and valuable polycyclic carbazoles, which were widely used as the key building blocks in materials science.
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Affiliation(s)
- Jin-Ming Yang
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, People's Republic of China
| | - Meng-Lian Yao
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, People's Republic of China
| | - Jun-Chi Li
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, People's Republic of China
| | - Ji-Kai Liu
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, People's Republic of China
| | - Bin Wu
- School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, People's Republic of China
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15
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Li Y, Zhang J, Zhao X. Importance of additive effects on the reactivity of Ag catalyzed domino cyclization: a computational chemistry survey. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Song L, Liu C, Tian G, Van Meervelt L, Van der Eycken J, Van der Eycken EV. Late-stage diversification of peptidomimetics and oligopeptides via gold-catalyzed post-Ugi cyclization. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Shinde MH, Ramana CV. Facile synthesis of the spiro-pyridoindolone scaffold via a gold-catalysed intramolecular alkynol cyclisation/hydroindolylation. Org Biomol Chem 2022; 20:2086-2095. [PMID: 35188513 DOI: 10.1039/d1ob02483c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A simple approach for the synthesis of pyridoindolone scaffolds with a spiroannulated tetrahydrofuran ring is described. The overall process comprises intramolecular sequential gold-catalysed 5-endo-dig alkynol cycloisomerization and subsequent addition of indole C2 to the in situ generated oxocarbenium cation.
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Affiliation(s)
- Mahesh H Shinde
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune 411 008, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Chepuri V Ramana
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune 411 008, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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18
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Li Y, Zhang J, Zhao X, Wang Y. Exploring the chemistry of E/Z configuration in gold-catalyzed domino cyclization: Insights on the stereoselectivity. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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19
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Inprung N, Ho HE, Rossi-Ashton JA, Epton RG, Whitwood AC, Lynam JM, Taylor RJK, James MJ, Unsworth WP. Indole-ynones as Privileged Substrates for Radical Dearomatizing Spirocyclization Cascades. Org Lett 2022; 24:668-674. [PMID: 34985297 DOI: 10.1021/acs.orglett.1c04098] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Indole-ynones have been established as general substrates for radical dearomatizing spirocyclization cascade reactions. Five distinct and varied synthetic protocols have been developed─cyanomethylation, sulfonylation, trifluoromethylation, stannylation and borylation─using a variety of radical generation modes, ranging from photoredox catalysis to traditional AIBN methods. The simple and easily prepared indole-ynones can be used to rapidly generate diverse, densely functionalized spirocycles and have the potential to become routinely used to explore radical reactivity. Experimental and computational investigations support the proposed radical cascade mechanism and suggest that other new methods are now primed for development.
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Affiliation(s)
- Nantachai Inprung
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Hon Eong Ho
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | | | - Ryan G Epton
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Adrian C Whitwood
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Jason M Lynam
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Richard J K Taylor
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - Michael J James
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | - William P Unsworth
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
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20
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Li Y, Zhou Y, Zhang J, Liu R, Zhao X, Wang Y. A DFT Study on Gold-Catalyzed Domino Cyclization for Post-Ugi Synthesis of Spiroindolines: Insights on the Origin of Remarkable Diastereoselectivity. Catal Sci Technol 2022. [DOI: 10.1039/d1cy01453f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a comprehensive DFT study on gold-catalyzed domino cyclization to spiroindolines. The diastereoselectivity was analyzed based on the established coordination spheres. These computational results not only explain the origin...
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21
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Gwinn RK, Boggess AE, Winter EP, Nataro C. Synthesis of disubstituted furans catalysed by [(AuCl) 2(μ-bis(phosphino)metallocene)] and Na[BArF 24]. Dalton Trans 2022; 51:17000-17007. [DOI: 10.1039/d2dt02999e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new gold compounds with bis(phosphino)metallocene ligands were prepared and characterized by NMR and X-ray crystallography. These and related compounds are catalysts in formation of disubstituted furans from terminal alkynes and pyridine-N-oxide.
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Affiliation(s)
- Reilly K. Gwinn
- Hugel Science Center, Department of Chemistry, 701 Sullivan Road, Lafayette College, Easton, PA 18042, USA
| | - Anna E. Boggess
- Hugel Science Center, Department of Chemistry, 701 Sullivan Road, Lafayette College, Easton, PA 18042, USA
| | - Elizabeth P. Winter
- Hugel Science Center, Department of Chemistry, 701 Sullivan Road, Lafayette College, Easton, PA 18042, USA
| | - Chip Nataro
- Hugel Science Center, Department of Chemistry, 701 Sullivan Road, Lafayette College, Easton, PA 18042, USA
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22
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Li HH, Zhang YP, Zhai TY, Liu BY, Shi CY, Zhou JM, Ye LW. Metal-free dearomatization reactions of naphthol-ynamides for the divergent and enantioselective synthesis of azaspirocycles. Org Chem Front 2022. [DOI: 10.1039/d2qo00685e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient Brønsted acid (BA) catalyzed intramolecular dearomatization cyclization of naphthol-ynamides has been developed, enabling the practical and divergent synthesis of two azaspirocycles in high yields.
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Affiliation(s)
- Hang-Hao Li
- Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yi-Ping Zhang
- Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Tong-Yi Zhai
- Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Bin-Yang Liu
- Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Chong-Yang Shi
- Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jin-Mei Zhou
- Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Long-Wu Ye
- Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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23
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Liu C, Van Meervelt L, Peshkov VA, Van der Eycken EV. The synthesis of diverse benzazepinoindoles via gold-catalyzed post-Ugi alkyne hydroarylation/Michael addition sequence. Org Chem Front 2022. [DOI: 10.1039/d2qo00810f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
By combining an Ugi-4CR and a gold-catalyzed cascade cyclization, diverse benzazepinoindoles are assembled in a step-economical, chemo- and regioselectivity fashion.
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Affiliation(s)
- Chao Liu
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Vsevolod A. Peshkov
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Dushu Lake Campus, Suzhou 215123, P. R. China
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Ave, Nur-Sultan 010000, Republic of Kazakhstan
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
- Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, Moscow, 117198, Russia
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24
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Liu C, Zhao R, Song L, Li Z, Tian G, He Y, Van Meervelt L, Peshkov VA, Van der Eycken EV. Palladium-catalyzed post-Ugi arylative dearomatization/Michael addition cascade towards plicamine analogues. Org Biomol Chem 2021; 19:9752-9757. [PMID: 34730164 DOI: 10.1039/d1ob01805a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A palladium-catalyzed intramolecular cyclization of Ugi-adducts via a cascade dearomatization/aza-Michael addition process has been developed. Diverse plicamine analogues are constructed in a rapid, highly efficient and step-economical manner, through the combination of an Ugi-4CR and a palladium-catalyzed dearomatization. The synthetic utility of this approach is illustrated by further functional group transformations.
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Affiliation(s)
- Chao Liu
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F, 3001, Leuven, Belgium.
| | - Ruiqi Zhao
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F, 3001, Leuven, Belgium.
| | - Liangliang Song
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China.
| | - Zhenghua Li
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F, 3001, Leuven, Belgium.
| | - Guilong Tian
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F, 3001, Leuven, Belgium.
| | - Yi He
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F, 3001, Leuven, Belgium.
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Vsevolod A Peshkov
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Dushu Lake Campus, Suzhou 215123, China.,Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Ave, Nur-Sultan 010000, Republic of Kazakhstan
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F, 3001, Leuven, Belgium. .,Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, Moscow, 117198, Russia
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25
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Zhong X, Luo J, Zhou W, Cai Q. A Synthesis of Spirooxindole‐Isoindolinones Through Ugi Reaction Followed by Copper‐Catalyzed Tandem C−N/C−C Coupling Process. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100889] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Xianqiang Zhong
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education College of Pharmacy Jinan University No. 601 Huangpu Avenue West Guangzhou 510632 People's Republic of China
| | - Jianghao Luo
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education College of Pharmacy Jinan University No. 601 Huangpu Avenue West Guangzhou 510632 People's Republic of China
| | - Wei Zhou
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education College of Pharmacy Jinan University No. 601 Huangpu Avenue West Guangzhou 510632 People's Republic of China
| | - Qian Cai
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education College of Pharmacy Jinan University No. 601 Huangpu Avenue West Guangzhou 510632 People's Republic of China
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26
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Liu C, Song L, Van Meervelt L, Peshkov VA, Li Z, Van der Eycken EV. Palladium-Catalyzed Arylative Dearomatization and Subsequent Aromatization/Dearomatization/Aza-Michael Addition: Access to Zephycarinatine and Zephygranditine Skeletons. Org Lett 2021; 23:5065-5070. [PMID: 34115493 DOI: 10.1021/acs.orglett.1c01590] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We have developed a novel palladium-catalyzed arylative dearomatization and subsequent aromatization/dearomatization/aza-Michael addition process of Ugi adducts, enabling the rapid construction of diverse zephycarinatine and zephygranditine scaffolds containing two adjacent quaternary carbon stereocenters with excellent chemoselectivity and stereoselectivity in a rapid, step-economical, and highly efficient manner. This approach shows broad substrate scope and excellent functional-group tolerance with diverse electron-rich and electron-deficient aromatic substrates. The synthetic utility of this method is further demonstrated by versatile transformations of the products.
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Affiliation(s)
- Chao Liu
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Liangliang Song
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Vsevolod A Peshkov
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Dushu Lake Campus, Suzhou 215123, P.R. China.,Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Ave, Nur-Sultan 010000, Republic of Kazakhstan
| | - Zhenghua Li
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.,Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, Moscow 117198, Russia
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27
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Veltri L, Amuso R, Petrilli M, Cuocci C, Chiacchio MA, Vitale P, Gabriele B. A Zinc-Mediated Deprotective Annulation Approach to New Polycyclic Heterocycles. Molecules 2021; 26:molecules26082318. [PMID: 33923572 PMCID: PMC8072660 DOI: 10.3390/molecules26082318] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/12/2021] [Accepted: 04/15/2021] [Indexed: 11/25/2022] Open
Abstract
A straightforward approach to new polycyclic heterocycles, 1H-benzo[4,5]imidazo[1,2-c][1,3]oxazin-1-ones, is presented. It is based on the ZnCl2-promoted deprotective 6-endo-dig heterocyclization of N-Boc-2-alkynylbenzimidazoles under mild conditions (CH2Cl2, 40 °C for 3 h). The zinc center plays a dual role, as it promotes Boc deprotection (with formation of the tert-butyl carbocation, which can be trapped by substrates bearing a nucleophilic group) and activates the triple bond toward intramolecular nucleophilic attack by the carbamate group. The structure of representative products has been confirmed by X-ray diffraction analysis.
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Affiliation(s)
- Lucia Veltri
- Laboratory of Industrial and Synthetic Organic Chemistry (LISOC), Department of Chemistry and Chemical Technologies, University of Calabria, Via Pietro Bucci 12/C, 87036 Arcavacata di Rende, Italy; (R.A.); (M.P.)
- Correspondence: (L.V.); (B.G.); Tel.: +39-0984-492817 (L.V.); +39-0984-492815 (B.G.)
| | - Roberta Amuso
- Laboratory of Industrial and Synthetic Organic Chemistry (LISOC), Department of Chemistry and Chemical Technologies, University of Calabria, Via Pietro Bucci 12/C, 87036 Arcavacata di Rende, Italy; (R.A.); (M.P.)
| | - Marzia Petrilli
- Laboratory of Industrial and Synthetic Organic Chemistry (LISOC), Department of Chemistry and Chemical Technologies, University of Calabria, Via Pietro Bucci 12/C, 87036 Arcavacata di Rende, Italy; (R.A.); (M.P.)
| | - Corrado Cuocci
- Institute of Crystallography, National Research Council, Via Amendola, 122/O, 70126 Bari, Italy;
| | - Maria A. Chiacchio
- Department of Drug Sciences, University of Catania, Viale A. Doria 6, 95125 Catania, Italy;
| | - Paola Vitale
- Department of Pharmacy—Pharmaceutical Sciences, University of Bari “Aldo Moro”, Via E. Orabona 4, 70125 Bari, Italy;
| | - Bartolo Gabriele
- Laboratory of Industrial and Synthetic Organic Chemistry (LISOC), Department of Chemistry and Chemical Technologies, University of Calabria, Via Pietro Bucci 12/C, 87036 Arcavacata di Rende, Italy; (R.A.); (M.P.)
- Correspondence: (L.V.); (B.G.); Tel.: +39-0984-492817 (L.V.); +39-0984-492815 (B.G.)
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28
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Inprung N, James MJ, Taylor RJK, Unsworth WP. A Thiol-Mediated Three-Step Ring Expansion Cascade for the Conversion of Indoles into Functionalized Quinolines. Org Lett 2021; 23:2063-2068. [PMID: 33645997 PMCID: PMC8041380 DOI: 10.1021/acs.orglett.1c00205] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Indexed: 12/02/2022]
Abstract
An operationally simple, high yielding three-step cascade process is described for the direct conversion of indole-tethered ynones into functionalized quinolines. A single "multitasking" thiol reagent is used to promote a three-step dearomatizing spirocyclization, nucleophilic substitution, and one-atom ring expansion reaction cascade under remarkably mild conditions. In addition, a novel route to thio-oxindoles is described, which was discovered by serendipity.
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Affiliation(s)
- Nantachai Inprung
- Department of Chemistry, University
of York, Heslington, York, U.K.., YO10 5DD
| | - Michael J. James
- Department of Chemistry, University
of York, Heslington, York, U.K.., YO10 5DD
| | | | - William P. Unsworth
- Department of Chemistry, University
of York, Heslington, York, U.K.., YO10 5DD
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29
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Hunjan MK, Panday S, Gupta A, Bhaumik J, Das P, Laha JK. Recent Advances in Functionalization of Pyrroles and their Translational Potential. CHEM REC 2021; 21:715-780. [PMID: 33650751 DOI: 10.1002/tcr.202100010] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/08/2021] [Accepted: 02/10/2021] [Indexed: 12/25/2022]
Abstract
Among the known aromatic nitrogen heterocycles, pyrrole represents a privileged aromatic heterocycle ranging its occurrence in the key component of "pigments of life" to biologically active natural products to active pharmaceuticals. Pyrrole being an electron-rich heteroaromatic compound, its predominant functionalization is legendary to aromatic electrophilic substitution reactions. Although a few excellent reviews on the functionalization of pyrroles including the reports by Baltazzi in 1963, Casiraghi and Rassu in 1995, and Banwell in 2006 are available, they are fragmentary and over fifteen years old, and do not cover the modern aspects of catalysis. A review covering a comprehensive package of direct functionalization on pyrroles via catalytic and non-catalytic methods including their translational potential is described. Subsequent to statutory yet concise introduction, the classical functionalization on pyrroles using Lewis acids largely following an ionic mechanism is discussed. The subsequent discussion follows the various metal-catalyzed C-H functionalization on pyrroles, which are otherwise difficult to implement by Lewis acids. A major emphasize is given on the radical based pyrrole functionalization under metal-free oxidative conditions, which is otherwise poorly highlighted in the literature. Towards the end, the current development of pyrrole functionalization under photocatalyzed and electrochemical conditions is appended. Only a selected examples of substrates and important mechanisms are discussed for different methods highlighting their scopes and limitations. The aromatic nucleophillic substitution on pyrroles (being an electron-rich heterocycle) happened to be the subject of recent investigations, which has also been covered accentuating their underlying conceptual development. Despite great achievements over the past several years in these areas, many challenges and problems are yet to be solved, which are all discussed in summary and outlook.
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Affiliation(s)
- Mandeep Kaur Hunjan
- Department of Pharmaceutial Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, Mohali, 160062, India
| | - Surabhi Panday
- Department of Pharmaceutial Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, Mohali, 160062, India
| | - Anjali Gupta
- Department of Pharmaceutial Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, Mohali, 160062, India
| | - Jayeeta Bhaumik
- Center of Innovative and Applied Bioprocessing (CIAB), Department of Biotechnology (DBT), Government of India, Sector 81 (Knowledge City), S.A.S., Nagar, 140306, Punjab, India
| | - Parthasarathi Das
- Department of Chemistry, Indian Institute of Technology (Indian School of Mines) Dhanbad, Dhanbad, 826004, India
| | - Joydev K Laha
- Department of Pharmaceutial Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, Mohali, 160062, India
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30
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Ghashghaei O, Pedrola M, Seghetti F, Martin VV, Zavarce R, Babiak M, Novacek J, Hartung F, Rolfes KM, Haarmann‐Stemmann T, Lavilla R. Extended Multicomponent Reactions with Indole Aldehydes: Access to Unprecedented Polyheterocyclic Scaffolds, Ligands of the Aryl Hydrocarbon Receptor. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202011253] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ouldouz Ghashghaei
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Marina Pedrola
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Francesca Seghetti
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Victor V. Martin
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Ricardo Zavarce
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Michal Babiak
- CEITEC Masaryk University University Campus Bohunice 62500 Brno Czech Republic
| | - Jiri Novacek
- CEITEC Masaryk University University Campus Bohunice 62500 Brno Czech Republic
| | - Frederick Hartung
- IUF Leibniz Research Institute for Environmental Medicine 40225 Düsseldorf Germany
| | - Katharina M. Rolfes
- IUF Leibniz Research Institute for Environmental Medicine 40225 Düsseldorf Germany
| | | | - Rodolfo Lavilla
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
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31
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Bag D, Sawant SD. Heteroarene-tethered Functionalized Alkyne Metamorphosis. Chemistry 2021; 27:1165-1218. [PMID: 32603015 DOI: 10.1002/chem.202002154] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Indexed: 12/11/2022]
Abstract
Heteroarene-tethered functionalized alkynes are multipotent synthons in organic chemistry. This detailed Review described herein offers a thorough discussion of the metamorphosis of heteroarene-tethered functionalized alkynes, an area which has earned much attention over the past decade in the straightforward synthesis of architecturally complex heterocyclic scaffolds in atom and step economic manner. Depending upon the variety of functionalized alkynes, this Review is divided into multiple sections. Amongst the vast array of synthetic transformations covered, dearomatizing spirocyclizations and cascade spirocyclization/rearrangement are of great interest. Synthetic transformations involving the heteroarene-tethered functionalized alkynes with scope, challenges, limitations, mechanism, their application in the total synthesis of natural products and future perceptions are surveyed.
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Affiliation(s)
- Debojyoti Bag
- Laboratory 212, Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Jammu, Canal Road, Jammu, Jammu and Kashmir, 180001, India
| | - Sanghapal D Sawant
- Laboratory 212, Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Jammu, Canal Road, Jammu, Jammu and Kashmir, 180001, India
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32
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Seyrani H, Ramezanpour S, Vaezghaemi A, Kobarfard F. A sequential Ugi–Smiles/transition-metal-free endo-dig Conia–ene cyclization: the selective synthesis of saccharin substituted 2,5-dihydropyrroles. NEW J CHEM 2021. [DOI: 10.1039/d1nj01159f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A convenient, transition-metal-free access to a series of unprecedented saccharin substituted 2,5-dihydropyrroles is reported.
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Affiliation(s)
- Hassan Seyrani
- Department of Chemistry, K. N. Toosi University of Technology, Tehran, Iran
| | - Sorour Ramezanpour
- Department of Chemistry, K. N. Toosi University of Technology, Tehran, Iran
| | - Aref Vaezghaemi
- Department of Chemistry, K. N. Toosi University of Technology, Tehran, Iran
| | - Farzad Kobarfard
- Department of Medicinal Chemistry, Shahid Beheshti School of Pharmacy Shahid Beheshti University, Tehran, Iran
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33
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Zhou K, Huang J, Wu J, Qiu G. An unexpected iron(II)-promoted reaction of N-arylprop-2-yn-1-imines with water: Facile assembly of multi-substituted pyrroles. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.11.049] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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34
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He Y, Song L, Liu C, Wu D, Li Z, Van Meervelt L, Van der Eycken EV. Access to Polycyclic Azepino[5,4,3- cd]indoles via a Gold-Catalyzed Post-Ugi Dearomatization Cascade. J Org Chem 2020; 85:15092-15103. [PMID: 33200934 DOI: 10.1021/acs.joc.0c01972] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The development of a rapid and diverse access to complex natural product-like 3,4-fused indole scaffolds has always attracted considerable attention from synthetic and medicinal communities. We herein disclose a modular and straightforward protocol to prepare the densely substituted polycyclic azepino[5,4,3-cd]indole scaffolds. This synthetic process involves an Ugi four-component reaction from easily available starting materials and a gold-catalyzed post-Ugi domino dearomatization/Michael addition sequence, enabling facile access to the highly functionalized azepino[5,4,3-cd]indole core with excellent chemo-, regio-, and diastereoselectivity.
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Affiliation(s)
- Yi He
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Chao Liu
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Danjun Wu
- College of Pharmaceutical Science, Zhejiang University of Technology, 18 Chaowang Road, 310014 Hangzhou, China
| | - Zhenghua Li
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.,Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, 117198 Moscow, Russia
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35
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Kumar H, Prajapati G, Dubey A, Ampapathi RS, Mandal PK. Intramolecular 6- exo- dig Post-Ugi Cyclization of N-Substituted 2-Alkynamides: Direct Access to Functionalized Morpholinone Glycoconjugates. Org Lett 2020; 22:9258-9262. [PMID: 33202129 DOI: 10.1021/acs.orglett.0c03486] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We herein report a chemo- and regioselective 6-exo-dig catalytic cyclization of Ugi adducts N-substituted 2-alkynamides to access functionalized morpholinone glycoconjugates in the presence of triphenylphosphine. This array allows an interesting multicomponent access to a library of functionalized morpholinone glycoconjugates under mild reaction conditions with regeneration of catalyst triphenylphosphine, supported by 31P nuclear magnetic resonance studies. Density functional theory shows the 6-exo-dig oxocyclization pathway is preferred, which supports our experimental observation.
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36
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Ghashghaei O, Pedrola M, Seghetti F, Martin VV, Zavarce R, Babiak M, Novacek J, Hartung F, Rolfes KM, Haarmann‐Stemmann T, Lavilla R. Extended Multicomponent Reactions with Indole Aldehydes: Access to Unprecedented Polyheterocyclic Scaffolds, Ligands of the Aryl Hydrocarbon Receptor. Angew Chem Int Ed Engl 2020; 60:2603-2608. [DOI: 10.1002/anie.202011253] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 09/30/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Ouldouz Ghashghaei
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Marina Pedrola
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Francesca Seghetti
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Victor V. Martin
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Ricardo Zavarce
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Michal Babiak
- CEITEC Masaryk University University Campus Bohunice 62500 Brno Czech Republic
| | - Jiri Novacek
- CEITEC Masaryk University University Campus Bohunice 62500 Brno Czech Republic
| | - Frederick Hartung
- IUF Leibniz Research Institute for Environmental Medicine 40225 Düsseldorf Germany
| | - Katharina M. Rolfes
- IUF Leibniz Research Institute for Environmental Medicine 40225 Düsseldorf Germany
| | | | - Rodolfo Lavilla
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
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37
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Sharma UK, Ranjan P, Van der Eycken EV, You SL. Sequential and direct multicomponent reaction (MCR)-based dearomatization strategies. Chem Soc Rev 2020; 49:8721-8748. [PMID: 33079105 DOI: 10.1039/d0cs00128g] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Dearomatization strategies in a multicomponent fashion often result in complex heterocyclic frameworks, which have attracted the attention of chemists due to their natural product-like structures. The combination of these two processes can easily achieve extended molecular complexity and diversity from simple starting materials with high atom economy. Thus, this field has attracted extensive interest owing to its potential significance in both asymmetric catalysis and convenient build-up of libraries of molecules with novel three-dimensional scaffolds, which may find application in medicinal chemistry. Accordingly, a systematic review on this topic will provide the synthetic organic community with a conceptual overview and comprehensive understanding of the different multicomponent reaction (MCR) cascades involving dearomatization as the characteristic step. In addition, this review will help researchers to look at this promising area from a different perspective with respect to drug discovery, new MCR-based disconnections and often hidden opportunities.
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Affiliation(s)
- Upendra K Sharma
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium.
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38
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Zheng L, Hua R. Recent Advances in Construction of Polycyclic Natural Product Scaffolds via One-Pot Reactions Involving Alkyne Annulation. Front Chem 2020; 8:580355. [PMID: 33195069 PMCID: PMC7596902 DOI: 10.3389/fchem.2020.580355] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 08/31/2020] [Indexed: 12/12/2022] Open
Abstract
Polycyclic scaffolds are omnipresent in natural products and drugs, and the synthetic strategies and methods toward construction of these scaffolds are of particular importance. Compared to simple cyclic ring systems, polycyclic scaffolds have higher structure complexity and diversity, making them suitable for charting broader chemical space, yet bringing challenges for the syntheses. In this review, we surveyed progress in the past decade on synthetic methods for polycyclic natural product scaffolds, in which the key steps are one-pot reactions involving intermolecular or intramolecular alkyne annulation. Synthetic strategies of selected polycyclic carbocycles and heterocycles with at least three fused, bridged, or spiro rings are discussed with emphasis on the synthetic efficiency and product diversity. Recent examples containing newly developed synthetic concepts or toolkits such as collective and divergent total synthesis, gold catalysis, C–H functionalization, and dearomative cyclization are highlighted. Finally, several “privileged synthetic strategies” for “privileged polycyclic scaffolds” are summarized, with discussion of remained challenges and future perspectives.
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Affiliation(s)
- Liyao Zheng
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, China
| | - Ruimao Hua
- Department of Chemistry, Tsinghua University, Beijing, China
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39
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Li Y, Zhao X. Assessing counterion effects in gold-catalyzed domino spirocyclization: an industrial perspective on hydrogen bonding. Phys Chem Chem Phys 2020; 22:19606-19612. [PMID: 32936160 DOI: 10.1039/d0cp03367g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We herein report a computational study of the hydrogen bonding in gold-catalyzed ipso-cyclization to diverse polyheterocyclic frameworks. The different roles of these hydrogen bonds are analyzed for the different ipso-cyclization reactions. The fine-tunability of the electronic as well as steric properties of gold counterions contributed substantially to the popularity of the dearomatization reaction, with robust applications in total synthesis and gold catalysis. We have found correlation between the hydrogen bonding parameters and chemoselectivity in gold-catalyzed spirocyclization, playing critical roles in determining the reaction direction of counterion-based enantioselective gold catalysis. The expanded use of counterions via hydrogen bonding interaction can occupy an important role in the future concerning catalyst optimization in gold catalysis.
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Affiliation(s)
- Yunhe Li
- Institute for Chemical Physics & Department of Chemistry, School of Science, State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Xiang Zhao
- Institute for Chemical Physics & Department of Chemistry, School of Science, State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China.
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40
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Song L, Tian G, Van Meervelt L, Van der Eycken EV. Synthesis of Pyrrolo[1,2-b]isoquinolines via Gold(I)-Catalyzed Cyclization/Enyne Cycloisomerization/1,2-Migration Cascade. Org Lett 2020; 22:6537-6542. [DOI: 10.1021/acs.orglett.0c02310] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Guilong Tian
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
- Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow, 117198, Russia
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41
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42
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Song L, Claessen S, Van der Eycken EV. Pyridine-Enabled C-N Bond Activation for the Rapid Construction of Amides and 4-Pyridylglyoxamides by Cooperative Palladium/Copper Catalysis. J Org Chem 2020; 85:8045-8054. [PMID: 32441517 DOI: 10.1021/acs.joc.0c00845] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A pyridine-enabled C-N bond activation of peptidomimetics employing cooperative palladium/copper catalysis in water is developed. Diverse amides and 4-pyridylglyoxamides are simultaneously synthesized through two steps from commercially available materials in a rapid, environmentally friendly, and high atom-economical manner.
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Affiliation(s)
- Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Sander Claessen
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium.,Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya street 6, Moscow 117198, Russia
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43
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Gerry CJ, Schreiber SL. Recent achievements and current trajectories of diversity-oriented synthesis. Curr Opin Chem Biol 2020; 56:1-9. [DOI: 10.1016/j.cbpa.2019.08.008] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 08/21/2019] [Accepted: 08/26/2019] [Indexed: 12/14/2022]
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44
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Chen X, Baratay CA, Mark ME, Xu X, Hong Chan PW. Gold and Brønsted Acid Catalyzed Spirocyclization of 2- and 3-Indolyl-Tethered 1,4-Enyne Acetates to Spiro[4,n]alkyl[b]indoles. Org Lett 2020; 22:2849-2853. [DOI: 10.1021/acs.orglett.0c00929] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Xiaoyu Chen
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | | | | | - Xinfang Xu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Philip Wai Hong Chan
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
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45
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Cao M, Teng QH, Xi ZW, Liu LQ, Gu RY, Wang YC. Facile synthesis of 2-alkynyl oxazoles via a Ce(OTf) 3-catalyzed cascade reaction of alkynyl carboxylic acids with tert-butyl isocyanide. Org Biomol Chem 2020; 18:655-659. [PMID: 31930236 DOI: 10.1039/c9ob02337b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
We developed an efficient and novel protocol to synthesize 2-alkynyl oxazoles from tert-butyl isocyanide and alkynyl carboxylic acids. This method allowed the synthesis of diversely functionalized oxazoles under mild reaction conditions, coupled with operational simplicity and these functionalized oxazoles showed a certain degree of biological activity. Moreover, compounds 2b, 2h, 2k, 2n, 2p and 2t exhibited good anticancer activities in human gastric cancer cells (MGC803) and human bladder tumor cells (T24), with IC50 below 20.0 μM.
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Affiliation(s)
- Ming Cao
- National Demonstration Center for Experimental Chemistry Education, Hunan Engineering Laboratory for Analyse and Drugs Development of Ethnomedicine in Wuling Mountains, Jishou University, Jishou 416000, P. R. China.
| | - Qing-Hu Teng
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| | - Zhi-Wei Xi
- National Demonstration Center for Experimental Chemistry Education, Hunan Engineering Laboratory for Analyse and Drugs Development of Ethnomedicine in Wuling Mountains, Jishou University, Jishou 416000, P. R. China.
| | - Li-Qiu Liu
- National Demonstration Center for Experimental Chemistry Education, Hunan Engineering Laboratory for Analyse and Drugs Development of Ethnomedicine in Wuling Mountains, Jishou University, Jishou 416000, P. R. China.
| | - Ren-Yong Gu
- National Demonstration Center for Experimental Chemistry Education, Hunan Engineering Laboratory for Analyse and Drugs Development of Ethnomedicine in Wuling Mountains, Jishou University, Jishou 416000, P. R. China.
| | - Ying-Chun Wang
- National Demonstration Center for Experimental Chemistry Education, Hunan Engineering Laboratory for Analyse and Drugs Development of Ethnomedicine in Wuling Mountains, Jishou University, Jishou 416000, P. R. China.
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46
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Rossi-Ashton JA, Clarke AK, Taylor RJK, Unsworth WP. Modular Synthesis of Polycyclic Alkaloid Scaffolds via an Enantioselective Dearomative Cascade. Org Lett 2020; 22:1175-1181. [PMID: 31940208 PMCID: PMC7145359 DOI: 10.1021/acs.orglett.0c00053] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
![]()
The polycyclic core of the akuammiline
alkaloids can be synthesized
from simple tryptamine and tryptophol derivatives via a Ag(I)-catalyzed
enantioselective dearomative cyclization cascade sequence. The complex
tetracyclic scaffolds are prepared via a rapid, versatile, three-step
modular synthesis from simple commercially available indole derivatives
in high yields and enantiomeric excess (up to 99% yield and >99% ee).
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Affiliation(s)
| | - Aimee K Clarke
- Department of Chemistry , University of York , York , YO10 5DD , U.K
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47
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48
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Li Y, Zhao X. Mechanism and origins of gold-catalyzed domino cyclization to spiroindolines: the role of periplanar cooperation and hydrogen bonding interactions. Org Chem Front 2020. [DOI: 10.1039/d0qo00359j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The detailed mechanism and origins of gold-catalyzed domino cyclization to indoloazocines are systematically studied by density functional theory.
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Affiliation(s)
- Yunhe Li
- Institute for Chemical Physics & Department of Chemistry
- School of Science
- State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- Xi'an Jiaotong University
- Xi'an 710049
| | - Xiang Zhao
- Institute for Chemical Physics & Department of Chemistry
- School of Science
- State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- Xi'an Jiaotong University
- Xi'an 710049
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49
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Li Y, Zhao X. Gold-catalyzed domino cyclization to diverse polyheterocyclic frameworks: mechanism, origin of the cooperative hydrogen bond, and role of π-stacking interactions. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00746c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The detailed mechanism and origins of gold-catalyzed domino cyclization to diverse fused polyheterocyclic frameworks by cooperative catalysis and cascade catalysis were studied systematically.
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Affiliation(s)
- Yunhe Li
- Institute for Chemical Physics & Department of Chemistry
- School of Science
- State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- Xi'an Jiaotong University
- Xi'an 710049
| | - Xiang Zhao
- Institute for Chemical Physics & Department of Chemistry
- School of Science
- State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- Xi'an Jiaotong University
- Xi'an 710049
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50
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Li Y, Zhao X. Gold-catalyzed domino cyclization enabling construction of diverse fused azaspiro tetracyclic scaffolds: a cascade catalysis mechanism due to a substrate and counterion. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00120a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The detailed mechanism and origins of gold-catalyzed domino cyclization to diverse fused azaspiro tetracyclic scaffolds by cooperative dual catalysis and cascade catalysis are systematically studied.
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Affiliation(s)
- Yunhe Li
- Institute for Chemical Physics & Department of Chemistry
- School of Science
- State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- Xi'an Jiaotong University
- Xi'an710049
| | - Xiang Zhao
- Institute for Chemical Physics & Department of Chemistry
- School of Science
- State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter
- Xi'an Jiaotong University
- Xi'an710049
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